6533372681 has 4 divisors (see below), whose sum is σ = 7127315664. Its totient is φ = 5939429700.

The previous prime is 6533372669. The next prime is 6533372689. The reversal of 6533372681 is 1862733356.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6533372681 - 2²² = 6529178377 is a prime.

It is a super-2 number, since 2×6533372681² = 85369917177674255522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6533372689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296971475 + ... + 296971496.

It is an arithmetic number, because the mean of its divisors is an integer number (1781828916).

Almost surely, 2^6533372681 is an apocalyptic number.

It is an amenable number.

6533372681 is a deficient number, since it is larger than the sum of its proper divisors (593942983).

6533372681 is a wasteful number, since it uses less digits than its factorization.

6533372681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593942982.

The product of its digits is 544320, while the sum is 44.

The square root of 6533372681 is about 80829.2810867448. The cubic root of 6533372681 is about 1869.4440740256. Note that the first 3 decimals are identical.

The spelling of 6533372681 in words is "six billion, five hundred thirty-three million, three hundred seventy-two thousand, six hundred eighty-one".